Alabama boy is convicted of capital murders of dad, stepmom and three siblings he carried out when he was just 14: Gunned them down after discovering stepmom wasn’t his biological mother

• Mason Sisk, now 17, of Elkmont, was convicted on Thursday after the jury took less than two hours to hand down the guilty verdict for the 2019 murders
• On September 2, 2019, he killed John Sisk, 38; Mary Sisk, 35; his two half-brothers, Colson and Grayson, and his half-sister Aurora
• Although a clear motive has not been determined, the teen was said to be upset after discovering his stepmom was not his biological mother  

An Alabama boy has been convicted of capital murder for gunning down his dad, three siblings, and stepmom after finding out she was not his biological mother at 14. 

Mason Sisk, now 17, of Elkmont, was convicted on Thursday after the jury took less than two hours to hand down the guilty verdict for the 2019 murders. 

He will be sentenced on July 25 and faces life in prison for the brutal act. 

During the trial, jurors were shown a video on Wednesday of Sisk admitting to the murders and saying he was ‘fed up of all the fighting,’ according to AL.com.

Mason Sisk, now 17, of Elkmont, was convicted on Thursday after the jury took less than two hours to hand down the guilty verdict for the 2019 murder of his family 

He will be sentence on July 25 and faces life in prison for the brutal act. Although a clear motive has not been determined, jurors were shown a video on Wednesday of Sisk admitting to the murders and saying he was ‘fed up of all the fighting’

Sisk killed his family while they slept on September 2, 2019, in their home near the Tennessee border. 

Before allegedly fatally shooting his parents and three siblings – including his infant brother – execution-style, then-14-year-old Mason Wayne Sisk had tried to poison his stepmother by putting peanut butter in her coffee, knowing she was allergic, according to authorities.

The harrowing murders ensued after Sisk found out his stepmother was not his biological mother. The September 2019 massacre rocked the small town of Elkmont.

Sisk’s Attorney Shay Golden said he was disappointed with out retrial’s outcome, saying: ‘Information we believed to be relevant was never really allowed to be discussed or considered. We have prepared for that, that’s part of the legal process. You prepared for the worst-case scenario.’ 

Golden said Sisk and his team are planning to appeal the verdict and that it ‘just feels like this inevitably will have to be tried again’ for a third time. His first trial was determined to be a mistrial and the retrial began on April 17. 

On September 2, 2019, he killed his father John Sisk, 38; and stepmom Mary Sisk, 35

He also killed his two half-brothers, Colson and Grayson, and his half-sister Aurora

The attorney also revealed that his client was emotional over the decision. 

‘I know that [Mason’s] disappointed. It’s difficult, he emotes in his way, [and] he doesn’t have anyone really to help him with that,’ the lawyer said, according to WAFF. 

‘We talked about it. He knew this was something to be considered the entire time was the possibility that the issues were setting up for appeal might come into play.’

Prosecutors showed text messages during closing arguments of the Alabama teen bragging about effectively using a gun to kill his family and that he could see the life drain from their eyes. Sisk’s team argued these were jokes. 

On the day of the alleged crimes, around 11pm on September 2, 2019, Sisk called 911 to report a shooting.

The then-14-year-old boy initially told responding deputies that he had been in the basement of his family’s home in the 2500 block of Ridge Road in Elkmont when he heard gunfire upstairs.

Before allegedly fatally shooting his parents and three siblings – including his infant brother – execution-style, then-14-year-old Mason Wayne Sisk had tried to poison his stepmother by putting peanut butter in her coffee, knowing she was allergic

According to investigators, Sisk later confessed to killing his family and led officers to the murder weapon, a 9mm pistol, which was legally held at the residence.

The victims of the shooting were identified as his father, John Sisk, 38; his stepmother, Mary Sisk, 35; his two half-brothers, six-month-old Colson and six-year-old Grayson, and his half-sister Aurora, aged five.

According to a 2020 report from a juvenile probation officer, Sisk ‘had not shown any sign of remorse’ for allegedly committing the atrocious crimes.

The document obtained by WAAY states: ‘Mason does not seem bothered by the fact he’s accused of murdering his family… While in detention, he has not talked about his family at all.’

Sisk’s probation officer noted that, other than getting several warnings and two disciplinary infractions, mostly for talking without permission, the teenager had been a model inmate.

‘While in detention, Mason follows directions, does his schoolwork and interacts well with others,’ the report reads.

Sisk’s cousin Daisy McCarty told the station WAFF in 2019 that she believed the killings were sparked by a revelation that Mary Sisk was not his birth mother.

https://youtube.com/watch?v=0PPL38zvQCg%3Frel%3D0%26showinfo%3D1%26hl%3Den-US

‘He didn’t know any different of who his mom was. And they just recently told him, and I think that’s really what triggered the little boy, to be honest with you,’ she said.

Sisk also had been acting out in the months preceding the murders by burning live animals and breaking into his school, she said.

Mary Sisk, originally from New Orleans, was a special education teacher for Huntsville City Schools, according to a biography on the website of Mountain Gap Schools.

‘I can’t think of any better person to be with us during the time she was needed,’ Evon Miller, whose granddaughter was in Mary’s class, told WZDX in 2020.

John Sisk had a number of jobs, including at a Harley Davidson shop, and had graduated from a Paul Mitchell cosmetology school.

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